Carbon-porous media composite electrode and preparation method thereof

Abstract

The present invention discloses a carbon-porous media composite electrode material, a composite electrode using the same and a preparation method thereof. The carbon-porous media composite electrode can be applied for a device such as a secondary battery, a capacitor or the like, or for preparing ultra pure water using a capacitive deionization process, purifying salty water or the like.

1. A carbon-porous media composite electrode material, comprising:
 (a) 5 to 95% by weight of a carbon electrode active material, and 
 (b) 5 to 95% by weight of a porous media, selected from the group consisting of silica gel, clay, Al 2 O 3 , SiO 2 , BaTiO 3 , a porous polymer and mixtures thereof, having a particle size distribution of from 0.1 to 100 μm and a particle density of from 0.1 to 2 g/cc. 
 
     
     
       2. The carbon-porous media composite electrode material according to  claim 1 , wherein the carbon electrode active material is selected from the group consisting of an activated carbon, a carbon aerogel, a carbon nanotube, a carbon nanofiber and mixtures thereof. 
     
     
       3. The carbon-porous media composite electrode material according to  claim 1 , further comprising a conductive material in an amount of 1 to 50% by weight. 
     
     
       4. The carbon-porous media composite electrode material according to  claim 3 , further comprising 1 to 20% by weight of a polymer binder to the total weight of a mixture of a carbon electrode active material, a porous media and a conductive material. 
     
     
       5. The carbon-porous media composite electrode material according to  claim 4 , wherein the polymer binder is selected from the group consisting of polytetrafluoroethylene, polyvinylidenefluoride, carboxymethylcellulose, hydropropylmethylcellulose, polyvinylalcohol and polyvinylchloride. 
     
     
       6. The carbon-porous media composite electrode material according to  claim 1 , which is in a sheet form. 
     
     
       7. A carbon-porous media composite electrode, comprising:
 (a) a foam or mesh of a metal selected from the group consisting of nickel, titanium and aluminum as a current collector, and 
 (b) the carbon-porous media composite electrode material according to  claim 6  pressed onto the foam or mesh of the metal selected from the group consisting of nickel, titanium and aluminum. 
 
     
     
       8. A capacitor, comprising the carbon-porous media composite electrode according to  claim 7 .